A crankshaft for a rotary compressor comprising a body formed with an oil supply passage; and an eccentric portion, fitted over the body, having a central axis eccentrically disposed relative to a central axis of the body, and provided with an oil outlet hole communicated with the oil supply passage and penetrating an outer peripheral wall of the eccentric portion.

A crankshaft for a rotary compressor comprising a body formed with an oil supply passage; and an eccentric portion, fitted over the body, having a central axis eccentrically disposed relative to a central axis of the body, and provided with an oil outlet hole communicated with the oil supply passage and penetrating an outer peripheral wall of the eccentric portion.

A driveshaft assembly for a compressor includes an unloader assembly and a driveshaft. The unloader assembly includes an unloader and a counterweight. The unloader assembly is rotationally supported by a bearing. The unloader includes a flank surface that is slidably engaged with a flank surface on the driveshaft.

A driveshaft assembly for a compressor includes an unloader assembly and a driveshaft. The unloader assembly includes an unloader and a counterweight. The unloader assembly is rotationally supported by a bearing. The unloader includes a flank surface that is slidably engaged with a flank surface on the driveshaft.

This exhaust cam shaft (2) is provided with a shaft part (5) and cam parts (6 to 13) provided on the outer circumference of the shaft part (5). The shaft part (5) has holes (16, 17, 19) opened at predetermined positions on the outer circumferential surface of the shaft part (5). The holes (16, 17, 19) are formed so as to be gradually tapered from an outside of the shaft part (5) toward a center of the shaft part (5) in a radial direction.

A variable compression ratio device may include a piston pin having first and second plunger spaces, a plunger device including a first plunger that is disposed to reciprocate in the first plunger space, a second plunger and a connection pipe that connects between the first and second plungers, a first check valve disposed in a first check space to move oil from a pipe passage to the first check space in a first direction, a second check valve disposed in a second check space to move the oil from the pipe passage to a second check space in a second direction; and a return member elastically supporting the second plunger to one side.

A bearing arrangement includes a shaft with an outer circumferential supporting surface, and a mounting device with an inner circumferential supporting surface. The mounting device supports the shaft in a rotatable manner using a bearing structure. At least one tiltable sleeve member is arranged between at least one of the supporting surfaces and the bearing structure.

Vibratory device (1) for compacting machine comprising a shaft (3), at least one eccentric mass (4,5,6) rotatable arranged around the shaft (3) and at least one motor (8) arranged around the shaft (3). The motor (8) is arranged for rotating drive of at least one of the eccentric masses (4,5,6) around the shaft (3). The motor (8) comprise a winding unit (9) connected to, the shaft (3) and a rotor (10) rotatable arranged around the shaft (3) and connected to at least one of the eccentric masses (4,5,6). The rotor (10) is arranged to be actuated by at least one magnetic field to rotation around the shaft (3) and the winding unit (9) is arranged to generate the magnetic fields which actuates the rotor (10) to rotation.

Methods and systems are provided for balancer shaft assemblies featuring bearing caps. In one example, a system may include a bearing cap connected to a housing surrounding a balancer shaft. The bearing cap may have faces which contact components of the balancer shaft. This contact may prevent movement of the balancer shaft in a particular direction.

A multi-joint crank drive of an internal combustion engine includes at least one coupling member supported on a crankpin of a crankshaft for rotation about a coupling member rotation axis; and at least one articulated connecting rod supported on a crankpin of an eccentric shaft for rotation about an eccentric rotation axis, wherein the at least one coupling member is connected with a piston connecting rod of a piston of the internal combustion engine for pivoting about a piston connecting rod rotation axis, and with the at least one articulated connecting rod for pivoting about an articulated connecting rod rotation axis, and wherein a rotation axis of the eccentric shaft is situated above a plane which receives a rotation axis of the crankshaft and is perpendicular to at least one cylinder longitudinal center axis, and wherein, respectively in relation to a total travel of the piston.